Conductor resistance

This tool calculates the maximum cable length that can be used without exceeding the allowable voltage drop and without degrading insulation, based on IEC and NEC standards. It supports DC, single-phase, two-phase, and three-phase systems, including parallel conductors and various temperature ratings. Input Parameters Current Type: Direct Current (DC), Single-phase AC, Two-phase, or Three-phase (3-wire/4-wire) Voltage (V): Enter phase-to-neutral voltage for single-phase, or phase-to-phase for polyphase Load Power (kW or VA): Rated power of the connected equipment Power Factor (cos φ): Ratio of active to apparent power, between 0 and 1 (default: 0.8) Wire Size (mm²): Cross-sectional area of the conductor Parallel Phase Conductors: Conductors with same size, length, and material can be used in parallel; total permissible current is sum of individual core ratings Voltage Drop (% or V): Maximum allowable voltage drop (e.g., 3% for lighting, 5% for motors) Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity Cable Type: Unipolar: 1 conductor Bipolar: 2 conductors Tripolar: 3 conductors Quadrupolar: 4 conductors Pentapolar: 5 conductors Multipolar: 2 or more conductors Operating Temperature (°C): Based on insulation type: IEC/CEI: 70°C (PVC), 90°C (XLPE/EPR), 105°C (Mineral Insulation) NEC: 60°C (TW, UF), 75°C (RHW, THHN, etc.), 90°C (TBS, XHHW, etc.) Output Results Maximum allowable cable length (meters) Actual voltage drop (% and V) Conductor resistance (Ω/km) Total circuit resistance (Ω) Reference Standards: IEC 60364, NEC Article 215 Designed for electrical engineers and installers to plan wiring layouts and ensure acceptable voltage levels at the load end.

This tool calculates power losses (I²R losses) in cables due to conductor resistance during current flow, based on IEC and NEC standards. It supports DC, single-phase, two-phase, and three-phase systems, including parallel conductors and various insulation types. Input Parameters Current Type: Direct Current (DC), Single-phase AC, Two-phase, or Three-phase (3-wire/4-wire) Voltage (V): Enter phase-to-neutral voltage for single-phase, or phase-to-phase for polyphase Load Power (kW or VA): Rated power of the connected equipment Power Factor (cos φ): Ratio of active to apparent power, between 0 and 1 (default: 0.8) Wire Size (mm²): Cross-sectional area of the conductor Conductor Material: Copper (Cu) or Aluminum (Al), affecting resistivity Parallel Phase Conductors: Conductors with same size, length, and material can be used in parallel; total permissible current is sum of individual core ratings Length (meters): One-way distance from supply to load Operating Temperature (°C): Based on insulation type: IEC/CEI: 70°C (PVC), 90°C (XLPE/EPR), 105°C (Mineral Insulation) NEC: 60°C (TW, UF), 75°C (RHW, THHN, etc.), 90°C (TBS, XHHW, etc.) Output Results Conductor Resistance (Ω/km) Total Circuit Resistance (Ω) Power Loss (W or kW) Energy Loss (kWh/year, optional) Voltage Drop (% and V) Temperature correction for resistance Reference Standards: IEC 60364, NEC Article 310 Designed for electrical engineers and installers to evaluate circuit efficiency, energy consumption, and thermal performance.

Adimissible let-through energy of the cable(K²S²)

This tool calculates the recommended cable cross-sectional area based on the IEC standard IEC 60364-5-52, using parameters such as load power, voltage, and circuit length. Input Parameters Current Type: DC, single-phase AC, two-phase, or three-phase (3-wire or 4-wire) Voltage (V): Phase-to-neutral (single-phase) or phase-to-phase (polyphase) Load Power (kW or VA): Rated power of the equipment Power Factor (cos φ): Range 0–1, default value 0.8 Line Length (meters): One-way distance from source to load Maximum Allowable Voltage Drop (% or V): Typically 3% Ambient Temperature (°C): Affects conductor current-carrying capacity Conductor Material: Copper (Cu) or Aluminum (Al) Insulation Type: PVC (70°C) or XLPE/EPR (90°C) Method of Installation: e.g., surface-mounted, in conduit, buried (per IEC Table A.52.3) Number of Circuits in Same Conduit: Used to apply grouping derating factor Are all parallel cables installed in one conduit? Allow conductor sizes smaller than 1.5 mm²? Output Results Recommended conductor cross-sectional area (mm²) Required number of parallel conductors (if any) Actual current-carrying capacity (A) Calculated voltage drop (% and V) Compliance with IEC standard requirements Reference standard tables (e.g., B.52.2, B.52.17) This tool is designed for electrical engineers, installers, and students to enable fast and compliant cable sizing.